NR 811.19(4)(4) If the depth of unconsolidated material is more than 60 feet and only 60 feet of grouted casing is required by the department, the casing shall be seated in firm limestone. NR 811.19(5)(5) If the depth of unconsolidated material is less than 60 feet at the well site or within one-half mile of the well site, the water system owner shall contact the department to determine the required minimum depth of grouted casing. An inner casing size of at least 12 inches in diameter shall be required to permit the installation of a grouted liner at a future date if the water from the well shows evidence of contamination. The department may waive the casing size requirement if it is demonstrated that it is unnecessary to meet the requirements of this chapter, but in that case a minimum of 100 feet of grouted casing is required. NR 811.19 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: am. (3), (5) Register January 2024 No. 817, eff. 2-1-24; correction in (5) made under s. 35.17, Stats., Register January 2024 No. 817. NR 811.20NR 811.20 Special requirements for granite wells. The department shall be contacted for specific case-by-case constructional requirements for all proposed developments of wells in Precambrian igneous and metamorphic rock commonly referred to as “granite”. At a minimum, continuous disinfection and possibly detention, shall be provided when the department determines that additional protection is necessary. NR 811.20 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10. NR 811.21NR 811.21 General requirements. Surface water sources include all lakes, rivers, and streams. The source of water selected by the water system owner as a surface water supply shall be from the best available source practicable. The source shall provide the highest quality water reasonably available which, with appropriate treatment and adequate safeguards, will meet the drinking water standards under ch. NR 809. The water system owner shall contact the department’s office of energy to initiate pre-application consultation regarding ch. 30, Stats., permitting. Any proposal that will result in a diversion from the Great Lakes basin requires department approval under s. 281.346, Stats. A water system that utilizes a surface water source shall meet all of the following requirements: NR 811.21(1)(1) Quality. The water system owner shall conduct an investigative study that includes both natural and man-made factors that may affect water quality of the selected surface water supply. The study shall include all of the following: NR 811.21(1)(b)(b) Determining degree of control of the watershed by the water system. NR 811.21(1)(c)(c) Assessing degree of hazard to the water supply by agricultural, industrial, recreational, shipping and residential activities in the watershed, and by accidental spillage of materials that may be harmful or detrimental to the treatment process. NR 811.21(1)(d)(d) Assessing all waste discharges, point source and non-point source, and activities that could impact the water supply. The location of each waste discharge shall be shown on a scale map. NR 811.21(1)(e)(e) For lakes, an analysis of the area water currents and for streams, an analysis of streamflows, and their potential impact on water quality. Consideration shall be given to potential wind and ice conditions. NR 811.21(1)(f)(f) Obtaining samples that are representative of the proposed intake structure based on depth and location. Parameters that may be subject to seasonal variation shall be taken for a period of up to one year or over a sufficient period of time to assess such variation. Testing shall include turbidity, pH, alkalinity, hardness, bromide, total organic carbon, color, taste and odor, ammonia, microbiological organisms, heavy metals including lead and copper, volatile organics, synthetic organics, inorganics, and radiological characteristics of the water. The microbiological testing shall satisfy the Long Term 2 Enhanced Surface Water Treatment Rule requirements found in ss. NR 809.33 to 809.335. The source water shall meet the surface water quality standards in ch. NR 102. NR 811.21(2)(2) Quantity. The quantity of the water at the source shall: NR 811.21(2)(a)(a) Be adequate in conjunction with water from other existing sources to meet the maximum 20-year projected water demand of the service area, as shown by calculations based on a one in 50-year drought or the extreme drought of record, and shall include multiple year droughts. NR 811.21 NoteNote: The department recommends water systems using a surface water supply source are provided with redundant intakes or an alternative means of supplying the maximum day water demand.
NR 811.21(3)(3) Location. The inlet for the intake shall not be located: NR 811.21(3)(a)(a) Within 1,000 feet of boat launching ramps, marinas, docks, or floating fishing piers which are accessible by the public. NR 811.21(3)(b)(b) In areas subject to excessive siltation or in areas subject to receiving immediate runoff from wooded sloughs or swamps. NR 811.21(3)(c)(c) Within 1,000 feet of a wastewater treatment plant outfall outlet. NR 811.21(4)(4) Minimum treatment. The design of the treatment processes, equipment, and structures shall depend on an evaluation of the nature and quality of the particular water to be treated. NR 811.21(4)(a)(a) The design of the water treatment plant must consider the worst conditions that are projected to occur during the life of the facility. NR 811.21(4)(b)(b) Filtration preceded by appropriate pretreatment shall be provided for all surface waters. NR 811.21(4)(d)(d) Additional treatment may be required by the department based on raw water sampling and other water quality factors. NR 811.21 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: am. (intro.), (1) (intro.), (b), (e), (2) (a) Register January 2024 No. 817, eff. 2-1-24. NR 811.22NR 811.22 Intakes. Intake structures shall provide for all of the following: NR 811.22(1)(1) Velocity of flow .25 to .50 feet per second through the inlet structure so that frazil ice will be held to a minimum. NR 811.22(1m)(1m) Sufficient opening area to minimize headloss shall be provided when buried surface water collectors are used. Particular attention should be given to the selection of backfill material in relation to the collector pipe slot size and gradation of the native material over the collector system. NR 811.22 NoteNote: The department recommends water systems using a surface water supply source include redundant intakes or an alternate means of supplying the maximum day water demand.
NR 811.22(2)(2) Withdrawal of water from the depth of the best water quality or the capability to draw from more than one level or more than one location if water quality varies with depth or location or both. NR 811.22(4)(4) Adequate protection against rupture by dragging anchors, ice, and other activity. NR 811.22(5)(5) Locations referenced by permanent monuments or latitude and longitude as measured by a Global Positioning System (GPS). NR 811.22(6)(6) A diversion device capable of keeping large quantities of fish or debris from entering an intake structure where shore wells are not provided. NR 811.22 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: cr. (1m), am. (3), cr. (3m) Register January 2024 No. 817, eff. 2-1-24. NR 811.23(1)(1) Shore well structures shall comply with all of the following: NR 811.23(1)(a)(a) Have motors and electrical controls located above grade and above flood level. NR 811.23(1)(d)(d) Be equipped with a minimum of 2 removable or traveling screens or an equivalent means of screening before the pump suction well. Systems with only one screen shall be provided with a bypass. NR 811.23(1)(e)(e) Provide chlorination or other chemical addition facilities for raw water transmission mains. NR 811.23(1)(f)(f) Have the intake piping valved with provisions for backflushing, testing for leaks, and control of frazil ice. NR 811.23(1)(i)(i) Be designed so sanitary sewer and finished water piping located within the shore well is installed in a manner to protect the shore well water quality and preserve the quality of the finished water. It is recommended that piping not be installed above the shore well to allow for access to the piping for routine maintenance. NR 811.23(1)(j)(j) Water discharged from traveling screens and hub drains within the shore well station may discharge into the shore well. NR 811.23(2)(2) The requirements in sub. (1) may be waived by the department on a case-by-case basis if it is demonstrated that they are not necessary to fulfill the other requirements of this chapter. NR 811.23 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: am. (1) (f), cr. (1) (i), (j) Register January 2024 No. 817, eff. 2-1-24. NR 811.231NR 811.231 Off-Stream raw water storage. NR 811.231(1)(1) Definition. In this section, “off-stream raw water storage reservoir” is defined as a facility into which water is pumped during periods of good quality and high stream flow for future release to the treatment facilities. NR 811.231(2)(2) Construction. Off-stream raw water storage reservoirs shall be constructed to assure all of the following: NR 811.231(2)(a)(a) Water quality is protected by controlling runoff into the reservoir. NR 811.231(2)(b)(b) Dikes are structurally sound and protected against wave action and erosion. NR 811.231(2)(d)(d) Point of influent flow is separated from the point of withdrawal, with separate pipes for influent to and effluent from the reservoir. NR 811.231(2)(f)(f) The reservoir is surrounded by a fence and unauthorized access is prevented. NR 811.231(2)(i)(i) A bypassing line is provided to allow for direct pumping to the treatment facilities. NR 811.231 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 22-074: am. (2) (d), (g), cr. (2) (i) Register January 2024 No. 817, eff. 2-1-24. NR 811.232(1)(1) If the department determines that chemical treatment is warranted for taste and odor control or the control of zebra and other mussels and other nuisance organisms in an intake structure, all of the following requirements shall be met: NR 811.232(1)(a)(a) Chemical treatment shall be installed in accordance with subch. VI and plans and specifications shall be approved by the department prior to installation. NR 811.232(1)(b)(b) Solution piping and diffusers shall be installed within the intake pipe or in a suitable carrier pipe. Provisions shall be made to prevent dispersal of chemicals into the water environment outside the intake. Diffusers shall be located and designed to protect all intake structure components. NR 811.232(1)(c)(c) A spare solution line shall be installed to provide redundancy and to facilitate the use of alternate chemicals. NR 811.232(1)(d)(d) Chemical feeders shall be interlocked with the plant system controls to shut down the chemical feed pump automatically when the raw water flow stops. NR 811.232(1)(e)(e) A sample line out to the intake shall be provided which will allow for collecting raw water samples unless the chemical control system will be shut off for periods sufficient to collect raw water samples at the shore well. NR 811.232(2)(2) The department may require pilot testing or demonstration studies of alternate intake treatment. Studies shall satisfy the requirements under s. NR 811.44. NR 811.232 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; renumbering of (1) to (4) made under s. 13.92 (4) (b) 1., Stats., Register November 2010 No. 659; CR 22-074: renum. (intro.), (1), (2), (3) to (1) (intro.), (a), (b), (c) and am. (1) (intro.), (c), cr. (1) (d), (2), renum. (4) to (1) (e) Register January 2024 No. 817, eff. 2-1-24. NR 811.24NR 811.24 General requirements. All water system related buildings shall be designed to maintain the sanitary quality of the water supply. Buildings subject to the requirements of this subchapter include surface water and groundwater water treatment plant buildings, structures and pumping stations, well pumphouses and enclosures, and booster pumping stations. Uses of the buildings shall be compatible with the protection of the water supply. NR 811.24 HistoryHistory: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10. NR 811.25(1)(1) Construction. All water system related buildings under s. NR 811.24 shall meet all of the following requirements: NR 811.25(1)(a)(a) Have adequate space for the installation of additional pumping units, water treatment equipment, chemical feed equipment, or controls, if needed, and for the safe servicing of all equipment. NR 811.25(1)(b)(b) Be durable, fire and weather resistant, and constructed in a manner to maximize sanitary protection of the water supply. NR 811.25(1)(c)(c) Be secure. Buildings shall have at least one outward opening door to the outside. All doors, windows, and hatches shall have locks. Any security alarms installed shall be connected to telemetry control and SCADA systems where such systems are used. NR 811.25(1)(d)(d) Be landscaped to conduct surface drainage away from the station and have a floor elevation at least 6 inches above the finished grade and at least 2 feet above the regional flood elevation as determined in s. NR 116.07 (4). Buildings shall be provided with year round dry land access. Below grade installations may be permitted only if the terrain at the site is such that a gravity drain system can be provided. Subsurface pits or pumprooms and inaccessible installations intended to house well heads, pumps, pump motors, or pump controls for pumping stations are prohibited except for below grade booster pumping stations as allowed per s. NR 811.80 (3) and (4). NR 811.25(1)(e)(e) Provide for all floors to drain so that floor runoff does not enter the treatment process or source water. Floors shall be sloped to a drain or sump. NR 811.25(1)(f)(f) Provide a suitable outlet for drainage water from pump glands so that the disposal of any drainage water is piped to waste or otherwise disposed of in a controlled manner. Pump gland drainage piping shall not be directly connected to a hub drain or a floor drain.
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Department of Natural Resources (NR)
Chs. NR 800- ; Environmental Protection – Water Supply
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